COSMOGAS MYDENS, Инструкция по установке, эксплуатации и обслуживанию, Страница: 43 / 76

43 MYDENS
COSMOGAS
7.11.4 - Climatic adjustment: adaptation to
different climatic areas
The previously recommended values are for homes with
average insulation and for climatic areas where the external
temperature used for calculating heat requirement is
-5°C (with this data and a high temperature plant, there is
correspondence with the graphics in Figure 7.3). If the climatic
area is different, adjust parameter
2021
“Design external
temperature (winter)” in a way to obtain a supply temperature
of 67°C (40°C in the case of “Low temperature” plants), when
the external temperature is that of the calculation base of the
heat requirement.
7.11.5 - Climatic adjustment: switching the
central heating service on and off
The climatic adjustment service is completely automatic, also
regarding switch-off at the end of the season and successive
switch-on at the start of the next season via the parameter
2020
. When the external temperature rises above the value
set in this parameter, the heating switches off automatically.
When the external temperature drops back below the value
set in this parameter, the central heating service switches
back on automatically.
7.11.6 - Climatic adjustment with room
compensation
Using the “Installer menu” (see chapter 7.18) adjust the
parameter
2003
to
02
. Everything operates exactly as in
the previous chapters relative to the “Climatic adjustment”,
with the difference that now the boiler pump is always on.
The opening of the room thermostat contact translates into a
parallel downward movement of the line regarding the value
set on the parameter, as in figure 7.3
2027
ppresent in
the “Installer menu” (see chapter 7.18). Parameter
2027
can assume values between 0°C and 50°C. The values
recommended for this parameter are:
- 10°C for high temperature plants (radiators)
- 3°C for low temperature plants (floor).
Values of this parameter that are too high can translate into
instability of the room temperature. Values that are too low
can make the room thermostat ineffective.
The climatic adjustment with room compensation can be used
in all cases envisioned in chapter 7.11.1, with the advantage
that continuous operation of the pump manages to stabilise
and make the room temperatures uniform; especially in
the case in which several heat plant loops have the flow
resistances that are much higher than others.
7.11.2 - Climatic adjustment: precautions
during adjustment
To set the supply temperature correctly, it is good practice to
immediately set the line setting values in figure 7.3. If these
values do not give a satisfactory result, proceed with the
relevant modifications, keeping in mind that:
- every parameter must be adjusted in small degrees;
- after each change, wait at least 24 hours to see the result;
- the more the adjustment line approaches the real
requirements of the building, the more building central
heating will be comfortable and the greater the energy
saving will be;
- using the or keys, it is possible to make the
small corrections highlighted in figure 7.3, i.e. move the
parallelism of the line, in steps of 1 °C more or less, up
to 10°C.
7.11.3 - Climatic adjustment: setting the
parameters
Using the “Installer menu” (see chapter 7.18), set:
-
2020
= “External switch-off temperature of the central
heating”, adjustable between 0 and 35°C. When the
external temperature reaches the value set in this
parameter, the central heating is switched-off automatically.
The central heating switches back on automatically when
the external temperature drops back below this value. The
recommended start value is 22°C.
-
2021
= “Design external temperature (winter)”, adjustable
between -20 and 5°C. It is the design external temperature
used to define the heat output necessary at the plant. The
value recommended for a typical home is -5°C;
-
2022
= “Supply temperature corresponding to the design
external temperature (winter)”, adjustable between 0 and
80°C. The supply temperature assumes the value set in
this parameter when the external temperature corresponds
to that set in parameter
2021
. The recommended start
values are: 40°C for low temperature plants (floor heating);
67°C for high temperature plants (radiators);
-
2023
= “External spring-like temperature”, adjustable
between 0 and 30°C. It is the external temperature at
which the central heating is to reach the minimum supply
temperature. The recommended start value is 18°C;
-
2024
= “Supply temperature corresponding to the external
spring-like temperature”, adjustable between 0 and 40°C.
The supply temperature assumes the values set in this
parameter, when the external temperature corresponds to
that set in the parameter
2023
. The recommended start
values are: 30°C for low temperature plants (floor heating);
42°C for high temperature plants (radiators);
- It is always possible to set the minimum and maximum central
heating temperatures using the respective parameters
3016
and
3015
present in chapter 11.
7 - USE